Treponema vincentii, Bacteroides forsythus, and fusobacteria synergistically are involved in which infection?
A. Ornithosis
B. Yaws
C. Necrotizing ulcerative gingivitis (NUG)
D. Gingivitis
E. Nongonococcal urethritis
Answer: C
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Pigs have feet with toes that do not touch the ground. These toes are examples of ____
a. vestigial structures b. evolving structures c. homologous traits d. deleterious mutations e. biological gradualism
Zach undergoes a sperm analysis and is upset to learn that he has oligospermia. This means that
A) he has cancer of the spermatogonia, and his sperm will never mature. B) he makes too many sperm, and they will crowd and kill each other. C) he makes too few sperm, lowering the probability of one sperm successfully reaching and fertilizing an oocyte. D) his sperm have two heads, each of which contains an entire genome of DNA, making them too heavy to swim to an oocyte.
__________ assorts gene pairs of homologous
chromosomes independently of gene pairs on all other chromosomes. Fill in the blank(s) with the appropriate word(s).
Bacteria which grow on the Mannitol Salt Agar and DO ferment the substrate, will result in a (an)
A. oxidation of the pH indicator B. reduction of the pH indicator C. no change in the color of the indicator D. increase in the pH of the medium E. decrease in the pH of the medium